MANUFACTURERS behind the 'Zing' wicket system have been left "stumped" by the number of incidents involving their bails at the World Cup.

The tournament has already seen five instances of the ball hitting or being edged into the stumps without the flashing electronic bails being removed.

Players are increasingly sharing their frustration at the issue, with Australia captain Aaron Finch declaring it "a bit unfair at times" and India's Virat Kohli suggesting "you literally have to smash the stumps".

England wicketkeeper Jonny Bairstow was also seen tapping the ball against the stumps after Ben Stokes was denied a wicket against Bangladesh, while batsman Jason Roy said "something has to be done" after an earlier occurrence.

David Ligertwood - a director at Zing, which invented and produces the product - says recent events have come as a surprise and is looking into potential reasons.

"The Zing wicket system has operated in well over a thousand games and this issue has not happened frequently. This recent cluster currently has us stumped," he said.

"Zing is currently monitoring the situation, including how they are being put in the pitch at the ground, while reviewing all aspects. At the same time Zing is looking into whether there are some practical modifications that can be made in the future to make the bails come off easier.

"This issue is obviously important as the game wants batsmen being dismissed when they should be. But even with this unusual spate of bails not falling, it remains definitive and it remains the same for both sides."

The International Cricket Council remains happy with the equipment, stressing that the bails weigh less than the heaviest set of traditional wooden alternatives.

Ligertwood points out that merely weighing the bails does not provide a full picture, with the rigidity of the stumps, condition of the pitch and use of 'stump cam' among the other factors, while there is also the ever-present possibility of human error to consider.

The company also claim a clear benefit still exists when determining dismissals that rely on line calls.

He added: "It is important to also consider that with the Zing wicket system, the third umpire can determine definitively from the footage in which frame the bail is dislodged, meaning with run outs and stumpings the correct decision is always made and batsman dismissed when they should be.

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